un complaining (adjective) patient: capable, willing to endure
Sinonime: accommodating,
calm,
composed, easy-going,
enduring, even-tempered, forbearing, forgiving,
gentle, imperturbable,
indulgent,
lenient, long-suffering,
meek,
mild, mild-tempered,
persevering,
persistent, philosophic,
philosophical,
quiet,
resigned, self-possessed,
serene, stoical,
submissive,
tolerant,
tranquil, uncomplaining,
understanding, unruffled, untiring
Antonime: agitated,
frustrated,
impatient,
intolerant,
unwilling